Index Kewensis plantarum phanerogamarum. nomina et synonyma omnium generum et specierum ab initio anni MDCCCCXLI usque ad finem anni MDCCCCL nonnulla etiam antea edita complectens Supplementum undecimum - Royal Botanic Gardens, Kew. (e prelo Clarendoniano, 1953)

The Journal of the Linnean Society. Botany - Linnean Society of London. (Longman, Green, Longman, Roberts & Green, 1869)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 2012)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 2012)